Mixer for natural gas



(NC) Model.)

2 Sheets-Sheet 1.

A A. PHILLIPS.

MIXER FOR NATURAL GAS.

Patented Aug. 26, 1890.

537i [ME/Wm GA N/74% @52 (No Model.) 2 Sheets-Sheet 2. A. A. PHILLIPS.MIXER FOR NATURAL GAS.

No. 434,948. Patented Aug. 26, 1890.

gwzzf. Q/LAZW.

UNITED STATES PATENT OFFICE.

AMBROSE A. PHILLIPS, OF TOLEDO, OHIO, ASSIGNOR OF ONE-HALF TO ROBERT A.\VALLAOE, OF CHICAGO, ILLINOIS.

MIXER FOR NATURAL GAS.

SPECIFICATION forming part of Letters Patent No. 434,948, dated August26, 1890.

Application filed December 7, 1888- Serial No. 292,875. (No model.)

To all whom it may concern:

Be it known that I, AMBROSE A. PHILLIPS, a citizen of the United States,residing atToledo, in the county of Lucas and State of Ohio, haveinvented certain new and useful Improvements in Mixers for Natural Gas;and I do herebydeclare that thefollowing is a full,clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying draw lngs, and to the letters of reference markedthereon, which form part of this specification,

My invention relates to mixers for natural gas, and has for its objecttoprovide a mixer whereby atmospheric air may be incorporated with theso-called natural gas *in such proportion as may be desired to insure aperfect combustion, and also that the amount of gas supplied to themixer may be conveniently regulated.

A further object is to provide a mixer with means for supplying acurrent of atmospheric air under pressure either as an auxilliary to thenatural draft, or as an independent air-supply.

A still further object is to provide for mixing the air and gas in amanner that shall preclude the possibilities of a back-current of airwithin the mixer, thereby varying the flow of gas to thecombustion-chamber.

I have illustrated my improved mixer in connection with a cupola formelting metals, it being especially adapted for this purpose, and inorder that the same may be more fully understood I will describe it inconnection therewith.

The invent-ion consists in the parts and combination of partshereinafter described, and pointed out in the claims.

- In the drawings, Figure1 is an elevation of a cupola for meltingmetals, the lower portion being broken away to disclose the interior, soas to illustrate the arrangement of my improved mixer when in usetherein. Fig. 2 is a side elevation of a complete mixer. Fig. 3 is anend view with the wings or dampers closed. Fig. 4c is a like viewshowing the wings or dampers opened. Fig. 5 is a central verticallongitudinal section. This figure is drawn on an enlarged scale. Fig. 6is a de= G to a crossbar H, formed integral with a ring of a diameter tofit closely within the shell and be secured therein by screws I or inany preferred manner.

I designates an oblong case within the mixer and consisting of twocup-like sections J and J, the section J being formed integral withcross-bar H and of a diameter to telescope within section J a shortdistance, forming a tight case, the sections being held in position byscrews J. The section J is provided with a cross-bar K near its taperend, said bar carrying a conical stud K at or near its center,thepurpose of which will appear farther on. At the taper end of thesection J is a threaded aperture, into which is screwed a tube or collarI said tube or collar being also threaded internally and adapted toreceive a pipe L in its bore, which pipe is of a length sufficient toextend from the tube K into the apex of the shell F.

M designates the gas-supply pipe leading from any preferred source andcoupled to a pipe N by means of a reducing-coupling N, the pipe N beingscrew-threaded and screwed into a screwthreaded perforation made at ornear the center of the cross-bar H, whereby the said pipe is broughtinto alignment with the conical stud K in section J of case I, and actsas a valve to regulate or entirely shut off the flow of gas to the mixerwhen screwed to or from the stud K, collar 0, secured upon pipe N,serving as a convenient means of turning the pipe, the coupling N beingscrew-threaded a sufficient distance to allow the pipe N, to be movedthe desired amount to regulate or shut oif the flow of gas withoutaffecting the joint.

P designates an auxiliary pipe tapped into air-pipe D and communicatingwith the interior of the mixer, air being admitted or closed therefromby means of a cock Q in said pipe.

R designates the exit-pipe for the intermingled air and gas, beingscrewed into the threaded opening in the apex of the shell, andextending a sufficient distance therein to be concentric with pipe L.

In operation, when, for illustration, the mixer is to be used insmelting ore within a cupola the wings G are opened, and pipe Nwithdrawn from its seat upon stud K by unscrewing it, thereby allowinggas to flow into chamber I and find an exit through pipeL into pipe R.Atmospheric air is introduced through the base of the mixer in anydesired volume regulated by the open or closed position of wings G, andthe air and gas unite within pipe R and are carried forward by thepressure to the point of combustion, it being understood that the flowof gas can be regulated by the relative arrangement of pipe N and stud Kand the flow of air by the open or closed position of the wings of themixer.

In a variety of uses to which my improved mixer may be put there isdanger of a back current of air within the mixer, thereby eitherentirely cutting off the flow of gas or causing a spasmodic flow,resulting in extinguishing the blaze and endangering life and property.It will be seen that, the gas entering a closed chamber and flowingthence through pipe L, any variation of pressure of atmosphere can takeplace within the mixer without affecting the flow of gas. In the use towhich my mixer is illustrated as particularly applicable-i. 6.,

I in cupolas for melting metalsthere is at times a necessity for agreater volume of atmospheric air than that furnished by the ordinarydraft through the base, and it becomes necessary to introduce air to thecupola under pressure by means of a blower, which air is introduced intothe cupola through pipe D. This increased pressure within the cupolawould tend (were the wings open anda natural draft relied upon) to causea backflow of air through the mixer. To avoid this backpressure, thepipe P is connected with the airpipe D, and is extended into the mixerat T, as shown,wherebyavolume of air from air-pipe D can be admitted toor cut off from the mixer. When the supplemental forced draft isemployed, the wings may be closed.

It will be seen that I have provided for any desired flow of gas, andfor either a natural draft of atmospheric air variable in degree at thewill of the operator, or of a forced draft from the blower.

NVhat I claim is 1. In a device for mixing air and natural gas, thecombination, with a shell having a nozzle at one end and closed at theopposite end by 'means of wings or dampers pivoted to a how of gas, andan exit-pipe extending from the case into the nozzle of the shell,substantially as shown and described.

2. The combination, with a cupola having an air-belt, of a shell havinga nozzle at one end and closed by dampers pivoted to a crossbar at theopposite end, a longitudinally-adj ustable gas-supply pipe passingthrough the said cross-bar, a fixed stud located within the shell,adapted for engagement with the end of the gas-pipe to regulate the flowof gas, an air-supply pipe also passing through the crossbar andentering the shell, and the air-pipe D, which enters the air-belt,connected .With the air-pipe entering the shell, substantially as andfor the purpose set forth.

3. In a mixer for air and natural gas, the combination, with a shellhaving a nozzle at one end and closed at the opposite end by means ofWings or dampers pivoted to a crossbar formed integral with a ringsecured in the shell, of a case located within the shell, and consistingof the sections J and J, the section J being formed integral with theinner face of the cross-bar, and secured within the section J, across-bar located within the section J, and a conical-stud carriedthereon at or near its center, a tube orcollar secured in the taperedend of the section J, and a pipe secured in said tube or collarextending into the nozzle secured in .the end of the shell, a maingas-supply pipe, a pipe connected therewith and adjustable therein, saidpipe passing adjustably through the cross -bar and entering the casewithin the shell, the free end of said pipe being adapted for engagementwith the conical stud on the cross-bar, whereby the flow of gas isregulated, all of said parts being combined and operated substantiallyas shown and described.

In testimony that I claim the foregoing as myown Ihereby affix mysignaturein presence of two witnesses.

AMBROSE A. PHILLIPS.

Witness:

WILLIAM WEBSTER, ANNA LEHANEY.

ICC

